In a recent group coaching session, something telling happened. The team – open, honest, committed – started talking about someone not in the room. Not out of malice, but frustration. One person’s behaviour had become a constant drag. The mood shifted when they were present, collaboration stalled, and trust eroded.
Toxic team behaviour often shows up this way. It doesn’t always explode loudly. More often, it ripples quietly through morale, performance, and relationships until the culture begins to crack. At The Deliberate Leader, this is something I see leaders struggle with far more often than they expect.
Sound familiar?
Every leader, at some point, encounters that team member. The one whose passive-aggressive, negative, or controlling behaviour casts a shadow over everyone else. Ignoring it isn’t an option. Here’s how to handle it deliberately.
How To Handle Toxic Team Behaviour (5 Steps)
When one person’s behaviour starts dragging the team down, the goal isn’t blame. It’s clarity. These five steps help you act early and protect the team.
⚡️ Listen Without Letting It Turn Into Gossip
When a team starts venting about someone not present, that’s a red flag. Their frustration is real. Acknowledge it. But don’t let it spiral into blame. Keep it constructive. Ask, “What would a better dynamic look like?” Shift the focus to solutions, not complaints.
⚡️ Don’t Dodge The Hard Conversation
Hoping it blows over? It won’t. Have the conversation – privately and directly. Lay out what you’ve observed and what needs to change. Be clear but fair. When behaviour is addressed early, it’s far easier to reset expectations and protect the team.
This is where leadership coaching often supports leaders to navigate difficult conversations with confidence and clarity.
If you want to build capability across leaders, the Leader as Coach program helps leaders develop the confidence and skills to have direct, constructive conversations.
⚡️ Make Expectations Non-Negotiable
Toxic behaviour continues when it’s tolerated. If your team values or behavioural expectations aren’t crystal clear, make them so. Write them down. Discuss them. Reinforce them. Culture isn’t a slogan. It’s what you allow, reward, and correct. Sustaining these standards over time is often strengthened through structured leadership development programs that reinforce expectations consistently.
⚡️ Support, But Don’t Enable
Not all difficult behaviour is malicious. Sometimes it’s burnout, stress, or misalignment. Offer help where it’s needed, but don’t confuse understanding with leniency. Change must be real, measurable, and sustained. This is where leadership coaching can help leaders hold boundaries, support change, and stay consistent over time.
⚡️ Close The Loop With The Team
Once you’ve addressed the issue, let the team know you’re on it. No need for details – just clarity that it’s being handled. Reinforce shared goals and the standard everyone is expected to uphold.
Toxic team behaviour spreads when left unchecked. But when a leader acts deliberately, the team sees a culture that’s protected, reinforced, and held to a high standard – on purpose, not by accident.
If you need support shifting the culture, team coaching can help reset expectations and rebuild trust.
Toxicity spreads when left unchecked. But when a leader acts deliberately, the team sees a culture that’s shaped, protected, and held to a high standard – on purpose, not by accident.
Frequently Asked Questions
What Is Toxic Team Behaviour?
Toxic team behaviour includes patterns such as negativity, passive-aggression, control, or avoidance that damage trust, morale, and performance across a team.
How Does One Toxic Team Member Affect Others?
One person’s behaviour can ripple through a team, slowing collaboration, increasing frustration, and eroding psychological safety if left unaddressed.
How Should Leaders Deal With Toxic Behaviour At Work?
Leaders should address behaviour early, set clear expectations, have direct conversations, and reinforce standards consistently to protect team culture.
Can Toxic Behaviour Be Changed?
Yes, when expectations are clear and support is provided. However, change must be observable and sustained, not just promised.
Ways To Work With Me
💬 One-on-one leadership coaching
🎯 Leadership development programs and training
🎤 Book me as a leadership speaker or MC for your next event
